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Extension > Garden > Diagnose a problem > What's wrong with my plant? > Annuals and Perennials > Petunia > Plants wilt or die

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Petunia > Plant > Plants wilt or die

1 of 2
  • White mold 1
  • White mold 2
  • White mold 3

White Mold
Sclerotinia sclerotiorum

  • Leaves on the entire plant or single branch wilt and turn brown
  • Stems turn tan to off-white where infected
  • Fluffy, white cotton-like fungal growth may been seen growing on the discolored stem when humidity is high
  • Small (1/16 to ½ inch), black, hard, round to irregular fungal resting structures can be found clinging to the outside an infected stem or embedded inside dead stems
  • More information on White Mold
2 of 2
  • Black root rot 1
  • Black root rot 2
  • Black root rot 3

Black Root Rot
Thielaviopsis basicola

  • Leaves turn yellow and wilt; leaf veins may remain green
  • Plants are stunted
  • Dark sunken black lesions occur on roots
  • Stems below ground may develop black longitudinal cracks
  • More information on Black Root Rot

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